Sometimes a little show and tell is helpful.
At the beginning of the school year I brought in a shopping bag of a sampling of books that my son read over the summer. (He read something like 48 big chapter books in 72 days). His two teachers' eyes got really big. I told them that yes they did need to form their own opinions about him but not to underestimate him and to please challenge him because if they didn't he would just make up challenges (and they might not like what he made up for himself and he might become a behavioral problem if they didn't).
Later on when his gifted testing came back (that was in the works from the previous year) we had another meeting and they mentioned my shopping bag full of books having shocked them but gave them a better insight into his abilities and drive.
